Spark-plug.



H. H. HOFF 8i F, E. TALLEUH,

. SPARK PLUG.

APPLICATEON FILED EUR-3,1917.

1,241,734. %tenteti 00:. 2,1911

ATTOBWEK' body portion or socket of rrE c. neicn i. "Plugs full, cieer, w *ec; cies iion. reference being had to 0239MB. ing drawings, iiorniing pert hereo.

@ur invention has relation to improvements in sperkgilugs; and it consists novel features of construction more fnliy iorsii in the specification and pointeei o1 the cieim. e The olojecis of the present inventio provide a spark-ping for eiiplosive or eernei combns f ioh engines which iii e $905.37 in. its construction suitable means 101? delivering to the combustion chamber size desired quantity of inflammable iiqr {gesolene or its equivalent) to produce rich or priming mixture for pnrposes liris understood by those ski led in the are, that the engine must, in the ire-- joriby oi cases "be started with a, rich priming mixture, and when the engine is running, this mixture is changed io e lean mixture by -a'zhe admission of the proper coniplement of air to the manifold or vacuum chamber between the throttle oi the carioureter and the engine. in some cases necessary enriching of the starsi M is eiiectecl by means of grim connected. directly with ilile ca 5 these often cause flooding of one By our invention fine priming is eione eily through the spark ping, the letter discharging the geselene directly into the coinbustion chamber. There is time possibiliiy of flooding the cerloureter. vantages of the invention Wiil be from eiie following ciemileci eiesc'zri connection with the accompanying represents an eiey'esicn can of E ient n 1L e insulating member or plug 3, the upper reclue-ed noriion having passed over is, a screwi'nreadeei gland 4i which screws into the socket The inner reduced portion of the insulating plus" 3 enters the bore or gas che portion 2 of the socket, and

chamber Si is sufficiently spaces from she Waiis of said chamber co 1c .ve en annular clearance a,

around the Leading from and com- F? niunicoting ilills clearance when the m mbers 1, 3 and. 4; are assembled, is the passage-Way or core w of the inclined tube 5, the discharge end. said passcge-Waybeing below the slionio r s. Formed on the top W211i of ihe tube is an opening :2 which is normally by asorew-sockei, sleeve, or cap-piece 6 terminaiing in a Wing 7 for reeciy menipnie."cion fine inner end of the ciret Ween driven home bearing against Jone enierged basal portion 5 of she tube 5. In practice, Wlieneve'r'it is desired to inroeince a quenity of gasoiene into the comston chamber to insure a rich starting are, she socket '3 unscrewed sufiiciently o uncover "the genre or opening a (dotted position Fig, 2}, whereupon the required quantity of ihe hydrocarbon is introducei ougii the opef o ineo the bore or passage-way w, the liquid flowing down the passage-We w into the clearance a through the socket J or" tile s erir-piug into the chamnecessary quantity of priming may course depart in c iii-e details here shown Withfrom the spirit Features shown but not Weli understood in $19 eri; ll '2 110 QQSChyel a spark ping comen ouier sii bnier socket and an inner g ping shouldered thereto on the inr socizei extending beyond the '2 on in the present shoulder, said exie'nsien. being spaced from the inner, Walls of the socket, an open-ended tube on the socket terminating in an enlargerl basal portion and dispused at an.

incline. to the axis of file socket sun-c1 dis charging into the bore of *Vhe socket beiew the shoulder aforesaid, the outer Wail 1" the tube being screw threacied, said screwthreaded portion having a peripheral opening formed thereon, and an imperfomte' sorew-eap passed over the screw-threaded FRANK F. TALLEUR. Witnesses:

EMIL STAREK, Jos. A. MICHEL. 

